Padlock



JApril 13,1926. 1,580,574

, S. SEGAL PADLOGK Filed April 27, 192s -5 sheets-sheet 1 JNI/EA/TOR.

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- @ffm/4M ATTORNEYS.

18 camae/ Je April 13 1926. 1,580,574

s. sEGAL PADLocK Filed April 27, 192s s sheets-snelst 2 ,hawk (BK @N 28 14 27 INVENTOR.

EVT/@WMM A TTORNEY April 13 192s. v 1,580,574

S. SEGAL PADLOCK Filed April 27, 1923 3 SheeIts-Sheet 5 Patented epi-.'13, 1926.

UNiTsD STATES PATENT OFFICE."

SAMUEL snGAL, or NEW YORK, Yiv. Y., AssIGNon To snGAL METAL PRODUCTS coivr- PANY ING., or NEW YORK, n. Y., A coarozeATIoN 0F DELAWARE.

PADLOCK.

.Application IedApi'il 27,l 1923. Serial No. 634,990.`

i'aechanism. The invention is, for a padlock of the General type shownand described inv my prihr Patent No. 1,439,131, dated December 19, 1922, but contains several novel i'eat'ures and improvements'over the device oi said patent. l

Among the improvements of the present invention over thedevice described in the patent referred 'to are the Vconstruction oi the locking means' for holdingvthe shackle against removal, the construction andv location of the spring means `for retaining said Licking means in normal orvlocked position y and the construction of certain removable means adapted to prevent the key-plug from withdrawal from the padlock casing.

Other objects, advantages l and improvements over the aforesaidpatent willappear from vthe accompanying description, the in vention consisting in the novell partsv and combinations .of parts hereinafter vmore particularly described and then specified'in the claims.

In the accompanying drawings showing a practical embodiment of the invention:

Fig. 1 is a side elevation kof my improved aadlock with the hollow Vbody or` casing thereof shown in section whereby the interior parts may be clearly seen.

Fig, 2 is a. section on the line 2-2'of Fig. 1

3 is a horizontal section. taken through the padlock showing the key-plug in elevation and the shackle in closed and locked position.

Fig. 3a is a horizontal section taken through a partvoit the device showing the means for preventing the withdrawal of the long leg ot the shackle from the body or casing of the padlock. Fig. of Fig. 3.

.Fig ,5 is view similar` to Fig. 3 vbut show Fig.

4 isa horizontal section on the line' j ing theV shackle in unlocked or open posi- SEGAL, a citition.

' Fig. G is a horizontal section on the line t--G of Fig. 5.

Fig. 7 is a view similar to Fig. 6 but showing the locking dogr in a dilierent position. Fig. 8 is a plan view of the padlockwith the shackle, the upper wall ot the body and' Athe locking dog-removed.

Fig. 9 is a vertical cross-section on the line 9 9 of Fig. 8.

Fig. 10 is a View similar to Fig. 9 showing the looking means for Athe keyplug removed and the key plug partially withdrawn from the plug portion of the padlock.

Fig. 11 is a perspective view of the locking plate for preventingwithdrawal yof the key plug.

- Fig. 12 is a front elevation of a modification With the casing partially broken away to show the interior mechanism.V

' Fig. 13 is aV horizontal section on the line 12B-130i Fig. 12.

' -Figglf is a View similar toFig. 12 showing the key of the padlockrpartially Withdrawn even though the shackle is in open position.

Fig. 15 is a horizontal sectionv on i5- i5 of Fig. i4..

Fig. 16 is a yView similar .to Figs. 13 and 15 but showing the locking dog in norma] cr locked position.

Fig. 17 is a` perspective view of the lockitng dog of the preferred form of the inven- Aion. f Fig. 18 is a perspective view of the locking dog of the modification.

Fig; 19 is a plan view of a further modiication showing the casing inV section whereby the interior mechanism may be viewed. Fig. 2() is a front eleva-tion. ofv the modification of 19 showing the upper portion 'of the casing partially broken away.

Fig. 21 is a vertical .cross-section taken through. the modification just referred to.

Fig. 22 is a front elevation of the upper end of the key plug of said modification.

Fig. 23 is a perspective view of the lockthe line ing device for preventing removalr of the sus legs 3 and Ll respectively ot the shackle 5.

rl`he plug portion et the padlock is indicatedv at G. This plug portiomtogether with all the other interior parts ot the mechanism, is slipped bodily into the casing and is prevented Yfrom removal therefrom by a rivet 'l' passing through the plug portion and the opposite walls oi" the casing. Said plug portion 6 is also provided with a 'face plate 7 preferably integral therewith which engages the lower edge ot' the easing when the parts are in assembled position. The portion G is also provided adjacent one side thereofY with a bore S for receiving the longer leg 3 ol the shackle and with an annular opening 9 adjacent, the other side for receiving the shorter leg el. n l

rilhe portion G constitutes the barrel ot' an ordinary pin tumbler lock and receives therein a rotatable key plug` l() the head l1' of which inter-lits with a` suitable annular opening in the tace plate 7 A plurality el spring-actuated tnmblers 12 are slidably mounted within .itable chan'ibers in the portions 6 and are adapted toenter openings (not shown) in the key plug 10 to'preventrotation thereof. The key plug 10 may be roated by a key 13, as ordinarily, which is inserted in a slot in the head 1l and plug 10 to torce the pin tuinblers 12 Jfrom within the openings oll the key plug in a well known manner forming no part of my invention.

The end of the key plugl 10 is reduced and flattened as at 1l and is provided with a slot 15 therein as clearly indicated in Fig. 10. Said slot is adapted to removably receive a U-shaped locking plate 16 the. legs ot which engage the sides ol the end 1st ot the key plug and the body of which engages a shoulder l? ot the plug portion, whereby withdrawal ot said key plug trom the padlock is prevented. A slotted locking dog is indicated at .18 and is provided with ends 19 having rounded walls as shown in Fig. 1T, said ends being `adapted to enter notches 20 in the legs ot' the shackle. rthe reduced end lll ot the key plug carries the slotted locking dog l5, the. slot thereotl interlitting with said end whereby rotation of said key plug will rotate said locking doa'. Said end 1l is also provided with pertorations 2l receiving pins 22 whereby dislodgement or removal ot said locking ,dog from the keyplug is prevented. For retaining thev locking dog in normal or lockedvpositioiii or that position shown in Fig. whereby the ends 19 of the locking dog willengage'.within the notches 20, l haveprovided, springs, 23 which lie in snitabl' vertical grooves in either side of the plug portion G. lie. lower ends olf said springs are perforated and are'received by suitable lugs 2li on the plug portion (Fig. 2) whereby the springs are prevented from becoming displaced or 'from a sliding movement while the upper ends ot said springs engage and exert a spring pressure against the sides ot the locking dog.

Within the bore 8 is a compression spring which engages the lower end ot the leg 2l ot the shackle and tends by its action to force said leg upwardly within said bore. rthe side ot' said leg 3 is grooved as at 26 and the rivet T engages within said groove. Said rivet thus per'rorn'is the duel function ot' limiting the movement ofthe leg 7 in the bore 8 and ot holding the plug portion within the easing as has been explained.

yl"he operation ot the padlock is as tollows:

Assuming that the shackle is in closed position as shown in Figs. 3 and Il with its legs extending within the bore S and opening- 9 respectively, to open the shackle so that it will take the position shown in Fig'. 5, the key plug is rotated in either direction (see Figs. G and 7) by means ofthe key 13. As the locking dog 18 is carried by the key plug, as has been explained7 the ends 19 thereot are released from their engagement with the notches 2O in the legs of the shackle and the action of the spring 25 forces the shackle upwardly, this upward movement being limited by the rivet 7. The degree of rotation ot' the key plug land accordingly ot the locking dog is limited by the casing which acts as a stop therefor. Obviously, also, when the shackle is open, an end 19 of the locking dog abuts against the long leg ot the shackle and prevents rotation ot the locking dog and vot the key plug thereby making it impossible to remove thefkey until theshackle has been returned to closed position and the ends 19 et the locking dog have entered their respective notches 2O in the shackle. This feature is of distinct advantage tor the reason that it prevents removal and possible loss of the key when the shackle is open.

A further advantage ot the construction described lies in the tact that, in contradistinction to certain types of padlocks, the shackle cannot be released or opened with'- out using a key by striking' the casing a heavy blow to dislodge the locking dog from engagement with the shackle. In the present case, as the locking dog and key plug tit together, the locking dog may be actuated only by means of the proper key for the key plug.

The modified construction illustrated in Figs. 1 2 to 16 inclusive and Fig. 1S permits the key to be withdrawn even Vthough thershackle isopentor the reason that the locking dog Q7 ot this vcmistruction is prolll lll() vided with an opening 28 of a size and conliguration permitting the reduced end of the key plug to be partially rotated therein a distance suliicient to permit rotation of the key plug to its initial position whereby kthe key slot Will be in proper alignment for removal of the key. y

In the modilication illustrated in Figs. 19 to 24 inclusive the reduced end of the key plug is provided with a slot 29 adapted to removably receive a U-shaped locking plate 30 Which performs the same function as the pins 22 in the preferred form of the invention. In this modification also, I may einploy in lieu of the spring 23 in the preferred form of the invention, a pair of broad springs 3l for each side of the device, these springs being 1arovided with tits inter fitting with each other. Said tits 32 prevent these springs from relative movement with respect to each other. I have found in practice that the use of two springs is desirable for reason. that a greater spring action is gained than if one spring `only is used. If one thick spring were used it Would apt to set. l

lVhat I claim as my invention is:

l. In a padlock, a body, a shackle, a key plug in said body having a reduced end With flattened sides and a lockingl dog provided With a slot or opening therein receiving said reduced end, said locking dog being adapted to hold said shackle against movement.

2. In a padlock, a body, a shackle, a keyr plug in said body having a reduced end with iattened sides, a locking dog provided with a slot or opening therein receiving said reduced end, said locking dog being adapted t0 hold said shackle against movement and means for preventing removal of said locky dog from said key plug.

3. In a padlock, a body, a shackle, a key plug mounted in said body provided With a slot therein, a locking dog carriedby said key plug and adapted to interlock With said shackle and a removable locking plate enter-A ing said slot for preventing removal of said locking dog from said key plug.

4. In a padlock, a body, a shackle, a key plug mounted in said body and having' a slot therein, a locking dog carried by said key plug and adapted to interlock with said shackle and a removable U-shapedlocking plate adapted to enter said slot to prevent removal'of said locking dog from said key plug. l

5. In a padlock, a body, a plug portion in said body a shackle, a key plug mounted in said body,a locking dog associated with said key plug and adapted to vinterlock With said shackle and spring members extending longitudinally of said body intermediate said body and plug portion and bearing.

against said locking dog and tending to retain said locking dog in locked position.

6. In a padlock, a body, a shackle, a key plug Within said body, a locking dog associated with said key plug and adapted to interlock With said shackle, a lug on said body and a spring provided with a perforation received by said lug, said spring engaging said locking dog and tending to retain the same in locked position.

7. In a padlock, a plug port-1011 having grooves in the opposite Walls thereof extending longitudinally of said plug portion, a casing receiving said plug portion, a rotatable key plug, a shackle, a locking dog associated With said key plug and adapted to hold said shackle against movement and spring members lying in the grooves `in said plug portion and bearing against said locking dog and tending to hold said locking dog in normal or locked position.

8. InA a padlock, a body, a shackle, a key plug in saidbody, a locking dog associated with said key plug for holding said shackle against movement and a plurality of springs having tit members engageing With each other, said springs bearing against said locking dog and acting to retain the same in en- Y gagement With said shackle.

Signed at New York, in the" county of Nevi7 York and State of New York, this 26th yday of April A. D. 1928. i

SAMUEL VSEGrAL. 

